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Critical · 9.3 CVE-2026-48063 EUVD-2026-52440GHSA-qvv5-jq5g-4cgg

Baileys has message upsert / hist sync spoofing and app state corruption when using maliciously crafted protocolMessage payload

Published Aug 3, 2026 · Updated Aug 4, 2026 · Assigned by GitHub_M

Description

Baileys is a cocket-based TS/JavaScript API for WhatsApp Web. In versions prior to both 6.7.22 and 7.0.0-rc12, any Baileys session can be sent a malicious payload via the placeholderResendMessage and trigger a fake messages.upsert event with a fake message key and payload. This allows anyone to spoof messages. The same exploit also allows an attacker to corrupt the app state sync system by sending fake key shares, and also allows for history sync spoofing which also serves the same problem, injecting fake previous context or "on-demand" sync. This issue has been fixed in versions 6.7.22 and 7.0.0-rc12.

Affected products

VendorProductAffectedFixed
WhiskeySockets Baileys < 6.7.22, >= 7.0.0-rc.1, < 7.0.0-rc12 —
WhiskeySockets @whiskeysockets/baileys < 6.7.22, >= 7.0.0-rc.1, < 7.0.0-rc12 —

Affected packages

EcosystemPackageAffectedFixedRecord
npm @whiskeysockets/baileys < 6.7.22 6.7.22 GHSA-qvv5-jq5g-4cgg
npm @whiskeysockets/baileys >= 7.0.0-rc.1, < 7.0.0-rc12 7.0.0-rc12 GHSA-qvv5-jq5g-4cgg
npm baileys < 6.7.22 6.7.22 GHSA-qvv5-jq5g-4cgg
npm baileys >= 7.0.0-rc.1, < 7.0.0-rc12 7.0.0-rc12 GHSA-qvv5-jq5g-4cgg

References